Cydiance C0, C1, B1 and B3 temperature data loggers are equipped with high accuracy and stable digital temperature sensors.
We confirm that all sensors used, are manufactured by Texas Instruments(TI) from the United States.TI processes the calibration on each unit which traces back to the National Institute of Standards and Technology(NIST) from the USA.
You may find a calibration statement from TI as attached from below link, which applies to all sensors supplied to Cydiance.